Variable-speed mechanism.



J. GELL.

VARIABLE SPEED MBGHANISM.

APPLICATION FILED PERES, 1913.

. Patented Aug. 25, 1914.

2 SHEETS-SHEET 1.

THE NORRIS PETERS CO., PHTO-LITHO.. WASHINGTON, D. C.

J. GELL.

VARIABLE SPEED MEGHANISM.

APPLICATION FILED 1213.26, 191s.

1 1 08,74 1 Patented Aug. 25, 1914.

2 SHEETSWSHEBT 2.

@www Jam, Gau;

THE NORRIS PETERS C0.. FHOTOALITHO., WASHINGTON4 D. C

JOHN anni., or LONDON, nNeLaNn.

VARIABLE-SPEED IVECHANISM.

Specification of Letters Patent.

atented fang. 25, 19141..

Original application filed January 24, 1911, Serial No. 694,497. l'ivided and this application led February To all fr0/0m it may concern Be it known that l, JOHN Gunn, a subject of the King of Great Britain, residing at Pine Grove, rlollington Park, London, England, have invented certain new and useful improvements in Txariable Speed Mechanism, of which the following is a specification.

My invention relates to a variable speed mechanism which is particularly adapted for automatic transmitters as disclosed by me in Letters lPatent of the United States :fh-835,750, November 13, 1906, and #89O,04C2, J une 9, 1908, my present invention being a division of that disclosed in application for Letters Patent of the United States filed January 24:, 1911, #604,487

In the accompanying drawings, Figure 1 is a side elevation of my invention as applied to a telegraphic transmitter. Fig. 2 is a plan view of a transmitter embodying my invention. Fig. 3 is a vertical sectional view showing driving mechanism in elevation.

Referring to F ig. 1, l' here illustrate, as an example, a main and secondary key action to which my motor mechanism may be connected, and it is thought unnecessary to describe this transmitter mechanism in detail further than to point out that the members 3, 3a, which carry the transmitting pins of the main key action are operated from cams 5 on a shaft 32, and these levers 3, 3a, operate the hammer carrying the portions 3b, 3C, of the main key action, which in turn operate the secondary key action shown generally at E. f

The apparatus is driven from any suitable motor through a shaft 23, Figs. 2 and 3, carrying a friction drive disk 24: bearing upon a disk 25 on a shaft 26. This disk 25,through a friction wheel 27, drives another friction disk 26 on the shaft 29, and on this is a gear wheel 30 meshing with a gear 31 mounted on the shaft 32 journaled in the casing, and in a bracket 33, F ig. 2, and upon this shaft the double cam 5, 51 is mounted. The shaft 32 has fixed thereto a pinion 34: meshing with a gear 35 on the shaft 36 of the star-feed wheel. By this train of gearing the starfeed w'heel and the cam 5, 5a are driven in proper time with each other.

The friction disks and wheels are kept in proper driving contact by a spring 37 in a casing 38 fixed to the frame, said spring surrounding the end of the shaft 29 and press- Serial No. 759,396.

ing in a ring or disk 39 loose on said shaft, and bearing upon anti-friction balls d0 carried by a ring d1, said balls, in turn, bearing upon a rinfY or flange 42, the sleeve .t3 of which is pi ed at 4.41- to tne shaft 29.

For var ng the speed of the drive, the driving friction wheel is mounted adjustably on the motor shaft '23, so that by loosening the screw a5 .the wheel may be set in different positions toward or from the center of rotation of the disk 25.

rEhe transmission friction wheel 27 is mounted in a hanger i6 through which a screw threaded rod 47 passes. This rod or shaft turns in bearings in brackets /1-8, 49, being held against longitudinal movement by collars 50 pinned on the shaft. By turning the screw shaft the wheel bracket 46 may be adjusted in respect to the centers of rotation of the friction disks 25 and 26 to T:any the speed of transmission. A scale 51 is supported on the brackets 48 and 49, and a mark on the hanger t6 will register with the scale marks to secure neness of adjustment.

fit will be understood that the hanger 46 of the intermediate friction wheel 27 permits the proper pressure to be secured between the friction surfaces, this hanger being free to turn about the screw shaft,tl'1ough no appreciable turning movement takes place 1n securing adequate pressure for transmission.

i' claim z- 1.1711 combination ina variable speed mechanism, a rotary member to be driven, a drive shaft, and transmission means comprising a pair of parallel friction disks, arranged on parallel shafts, a friction wheel bearing on the opposing faces of the disks, a screw shaft, extending transversely to tbe shafts of the disks, and a hanger depending from said screw shaft and mediate friction 'wheel being` mounted in a bearing adj estable indially and movable transversely in i'oepeet to the frieion disks, eubsmntiziliyes described.

n Combination in a` Variable Speed mechanism, a nienibei to be rotai'ed, a motor Shaft, i friction drive wheel 'thei'eon, adjustable longitudinnily of the Seid Shaft, a. frietion disk mounted on e shaft at right ingles to the inotor shaft and upon which disk the driving LLietion Wneel beni's, e second friction disk, rotating in a pinne peiaiie with the iist, n, Shaft therefoi' arranged parallel with that of the fst disk, a iietion wheel Copies of this patent may be obtained for five cencs each, by addressing the Commissioner of Patents,

jouinaied in a inowible hanger between the wie disks adgnstnbly mounted, and when ad jnsednioving 'toward the peiiphei'y of one 

